What is required of a ship station that has established initial contact with another station on 2182 kHz or Ch-16?

When a ship station establishes initial contact with another station on 2182 kHz or Channel 16, it is required to change to an authorized working frequency for the transmission of messages. This practice is essential because Channel 16 is primarily designated for distress, urgency, and safety communications. To ensure that this critical channel remains available for emergencies, once the initial contact has been made, communication should be moved to a different frequency that has been allocated for routine operations or messages.

This requirement helps to avoid congesting Channel 16, allowing vessels in distress to have a clear line of communication. It also facilitates smoother and more organized exchanges of information, which is crucial in busy maritime environments.

The other options highlight various aspects of maritime communication protocols but do not directly address the specific requirement for established contacts after initiating communication on Channel 16.